RX 7900 GRE 4-way Round Up (Gigabyte + Sapphire)

1. Introduction2. Gigabyte RX 7900 GRE Gaming OC3. Sapphire RX 7900 GRE Nitro+4. Sapphire RX 7900 GRE Pulse5. Sapphire RX 7900 GRE Pure6. Testing Methodology7. Game Benchmarks8. Clock Speed9. GPU Temperatures10. Acoustics11. Noise-Normalised Temperatures12. Power Draw and Efficiency13. Overclocking14. Closing Thoughts15. View All Pages

For our manual overclocking tests, we used AMD's Adrenalin software. Our best results are as below.

Overclocking the 7900 GRE is very tedious, as AMD has heavily locked down the overclocking sliders. You can easily max out both the GPU and memory sliders, the only real challenge is finding how far you can undervolt each model – in my experience, somewhere between 960-980mV proved stable.

With these overclocks dialled in, all four cards managed to run at over 2600MHz, with the Pure and Pulse actually getting closer to 2700MHz in my testing.

The gains on offer aren't massive though, typically just a handful of frames, so you could easily argue it's not worth the hassle, undervolting to improve efficiency may be more beneficial instead.

Interestingly, power draw for the Nitro+ and Gaming OC actually dropped when overclocked, despite the fact I increased the power limit up to its maximum of 115%. I'm not sure if this is a bug or strange architectural quirk, but it's not what I expected to see and isn't something I've come across with other RDNA 3 cards.

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